e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
The Journal of Organic Chemistry
Methyl-substituted fluorine-containing cyclobutenes. Establishment of the HF [high frequency] coupling constants between a vinylic methyl group and the ring fluorines
JD Park, TS Croft
Index: Journal of Organic Chemistry, , vol. 38, p. 4026 - 4028
... React., 12, 1 (1962); (b) W. H. Sharkey in "Fluorine Chemistry Reviews," Vol. ... The organic layer was dried and distilled to give 10 g of l-methyl- 2,4,4-trichloro-3,3-difluorocyclobutene (5): bp 139-139 .so (632 mm); n% 1.4489; d26 1.50; molar refractivity, calcd 37.82 ... 4028 J . Org. ...